Learn Developing REST API in Node.js using LoopBack Framework

Welcome to Facebook Developer Circle Meetup
* Date: Sunday, 26 Mar 2017
* Place: Ngalup.co, Mojolangu, Malang
Last login: Sun Mar 26 09:00:00 2017 from 127.0.0.1
marudits@dev-circle-mlg:~$ _

Learn Developing REST API
in Node.js using LoopBack Framework
by Marudi Tri Subakti

marudits@dev-circle-mlg:~$ whoami _

PART
1
{
“name”: “Marudi Tri Subakti”,
“phone”: “(+62) 85646628435”,
“email”: “marudits@gmail.com”,
“works”:[
{
“company”: “PT Musica Studio’s”,
“role”: “Web Developer”,
}, {
“company”: “Tebengan ID”,
“role”: “Web Developer”
}
]
}

marudits@dev-circle-mlg:~$ whoami
marudits@dev-circle-mlg:~$ man –k ‘REST API’ _

What is?
• Put it simply, REST = REpresentational State Transfer , is an architectural style
define to help create and organize distributed system.
• It is not a guideline, not a standard, or anything that would imply that there are
set a hard of rule to follow
3
PART
21
• There is no Request for Comments (RFC), which can leads to a widespread
incomplete REST ideal
• But have set of contraints to define uniform interface: Client-Server, Stateless,
Cacheable, Uniform Interface, Layered System, Code-on-Demand

Why?
• Performance, communication style is meant to be efficient and simple
3
PART
21
• Scalability, simple interaction greatly allow to handle heavy interaction
• Modifiability, separation of concerns allow to minimize risk
• Portability, can be implemented and consumed by many type of technology
• Reliability, allows for the easier recovery of system after failure

How it works? (Resources)
• Representations
3
PART
21
• Identifier
• Metadata
• Control Data

• Representations, it can be any way of representing data (binary, JSON, XML, etc)
3
PART
21
• Identifier
• Metadata
• Control Data

• Representations
3
PART
21
• Identifier, a URL that retrieves only one specific resource at any given time
• Metadata
• Control Data

• Representations
3
PART
21
• Identifier
• Metadata, Content-type, last-modified time, and so forth
• Control Data, is-modifiable-since, cache-control

marudits@dev-circle-mlg:~$ man –k ‘REST API’
marudits@dev-circle-mlg:~$ lb --help _

PART
3
42
What is?
• LoopBack framework is a set of Node.js modules that you can use
independently or together to quickly build REST APIs
• Interacts with data sources through the LoopBack model API, available locally
within Node.js, remotely over REST, and via native client APIs for iOS, Android,
and HTML5
• Apps can query databases, store data, upload files, send emails, create push
notifications, register users, and perform other actions provided by data
sources and services.
Introduction

PART
3
42
What is?
Architecture

• Create dynamic end-to-end REST APIs with little or no coding
PART
3
42
Why we use?
• Access data from various data source: major relational databases, MongoDB,
SOAP and REST APIs
• Incorporate model relationships and access controls for complex APIs
• Separable components for file storage, third-party login, and OAuth 2.0
• MIT open-source license

PART
3
42
Why we use?
Loopback Express Sails Meteor
Type API Framework HTTP server
library
Web MVC
framework
Full-stack JavaScript
app platform
Top
Features
Enterprise connectivity, API Explorer,
generators, client SDKs, websocket
microservices
HTTP
routing,
middleware
Rails familiarity,
MVC
Universal JavaScript,
reactive rendering,
websocket
microservices
Suitable
For
Web apps, APIs Simple web
apps
Web apps, APIs Web apps
Clint
SDKs
Angular, Browser, Node.js, iOS, Android,
Xamarin
N/A None JavaScript, Cordova
for iOS and Android,
React, AngularJS
Data
Source
In-memory/file, MongoDB, MySQL,
Oracle, PostgreSQL, SQL Server, ATG,
Email, REST, SOAP, many more.
None In-memory, File,
PostgreSQL, MySQL,
MongoDB
MongoDB, MySQL
and PostgreSQL via
3rd-party packages
ACLs Yes No No Basic allow/deny
Comparation

PART
3
42
Why we use?
“By using LoopBack, we can build REST API easily
with little or no coding, connect to various
datasources and define model relationship & its
control access.”

PART
3
42
How it works?
Core Concepts (Modules)

PART
3
42
How it works?
• Models : Dynamically mock-up models and expose them as APIs without worrying
about persisting
(some) Key Features
• Abstraction : Connect to multiple data sources or services and get back an
abstracted model with CRUD capabilities independent of backing data source.
• Data : Enable connections to RDBMS and noSQL data sources and get back an
abstracted model
• ACL : Controls if a principal can perform a certain operation against a model.
• Remote Method : exposed remote method over a custom REST endpoint to
perform operations not provided by LoopBack’s standard model REST API
• Remote Hook : executed before or after calling a remote method, either a
custom remote method or a standard CRUD inherited from PersistedModel

PART
3
42
Getting Started
• Install : Install the LoopBack CLI tool
$ npm install –g loopback-cli
• Create App : Create a “Hello World” LoopBack application
$ lb
• Create Models : Generate models through CLI
$ lb model
• Run : Run as you would any Node application
$ node .
• Explore : Enables you to exercise all generated API endpoints
http://127.0.0.1:3000/explorer

marudits@dev-circle-mlg:~$ lb --help
marudits@dev-circle-mlg:~$ npm run start _

i
< />
{ }
http://loopback.io/

i
< />
{ }
/* install loopback */
$ npm install –g loopback-cli
/* create app */
$ lb
/* create models */
$ lb model
/* attach to datasource */
$ lb datasource
/* define relations */
$ lb relation
/* run app */
$ node .
/*  develop your own */
/* set access control */
$ lb acl

i
< />
{ }
https://ant.design/

i
< />
{ }
/* install antd-init generator */
$ npm install –g antd-init
/* make and move to app directory */
$ mkdir helloworld && cd helloworld
/* create app */
$ antd-init
/* run app */
$ npm start
/*  develop your own */

marudits@dev-circle-mlg:~$ npm run start
marudits@dev-circle-mlg:~$ ping tebengan.id _

Should our stories resonate with you, why not
share your stories and aspiration with us
and help build tebengan together (?)
build@tebengan.id

marudits@dev-circle-mlg:~$ npm run start
marudits@dev-circle-mlg:~$ ping tebengan.id
marudits@dev-circle-mlg:~$ shutdown –h now _

Learn Developing REST API in Node.js using LoopBack Framework

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